Oval filter

- Donaldson Company, Inc.
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Description

FIG. 1 shows a perspective view of an oval filter, according to the principles of the present invention;

FIG. 2 shows a right end elevational view thereof, a left end elevational view is not being shown as it is a mirror image of the right end elevational view;

FIG. 3 shows a front elevational view thereof, a rear elevational view is not being shown as it is a mirror image of the front elevational view; and,

FIG. 4 shows a top plan view thereof, a bottom plan view is not being shown as it is mirror image of the top plan view.

Referenced Cited
U.S. Patent Documents
3807150 April 1974 Maracle
3878594 April 1975 Minor, Jr. et al.
3966646 June 29, 1976 Noakes et al.
4289513 September 15, 1981 Brownhill et al.
4430223 February 7, 1984 Miyakawa et al.
4439321 March 27, 1984 Taki et al.
4498989 February 12, 1985 Miyakawa et al.
5304351 April 19, 1994 Tanaka et al.
Patent History
Patent number: D417268
Type: Grant
Filed: Apr 26, 1996
Date of Patent: Nov 30, 1999
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventor: Gary R. Gillingham (Prior Lake, MN)
Primary Examiner: Lisa Lichtenstein
Law Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt
Application Number: 0/53,413
Classifications
Current U.S. Class: Filter (D23/365)
International Classification: 2304;